102 results found

Search Results for: polar

Polar

Definition adjective (general) Of, or having one or more poles (in a spherical body); being in opposite... Read More

Polar body

Definition noun, plural: polar bodies The cell that results from the asymmetric division of an oocyte. Supplement In animals... Read More

Polar compound

Definition noun, plural: polar compounds A compound made up of molecules joined by assymetrical polar... Read More

Polar molecule

Definition noun, plural: polar molecules A molecule with a net dipole as a result of the opposing charges (i.e. having... Read More

Amphipathic

Amphipathic is a word used to describe a chemical compound containing both polar (water-soluble) and nonpolar (not... Read More

Chemical Composition of the Body

In order to fully understand the mechanisms of human physiology, it is important to have an understanding of the chemical... Read More

Bears

Bears Definition Bears are mammals belonging to the family Ursidae. They typically have massive bodies, coarse heavy fur,... Read More

Polar solvents

polar solvents Solvent's that exhibit polar forces on solutes, due to high dipole moment, wide separation of charges, or... Read More

Hydrophilic

Hydrophilic Definition What does a hydrophile (or hydrophilic molecule) mean? If a molecule is “water-loving”, it is... Read More

Hydrophobic

Hydrophobic Definition The fear of mixing or reacting with water under a given set of reaction parameters is often referred... Read More

Parthenogenesis

To reproduce, by definition, means to produce new offspring. The process is referred to as reproduction, which is one of the... Read More

Polarity

Definition noun (1) The presence of or having distinct and opposite poles (2) The condition of having contrasting properties... Read More

Nonpolar compound

Definition noun, plural: nonpolar compounds A compound comprised of molecules linked through chemical bonds arranged in such... Read More

Water

Water Definition (1) (biochemistry) A chemical substance, with chemical formula H2O, that is a clear, colorless, odorless,... Read More

Habitat

Habitat Definition Habitat refers to the place or the location where an organism (or a biological population) lives,... Read More

Movement of Molecules Across Cell Membranes

Diffusion Diffusion is essentially the movement of molecules from a region of higher concentration to a region of lower... Read More

Hydrogen bond

Definition noun plural: hydrogen bonds A type of chemical bond that is formed when the slightly positive hydrogen atom of... Read More

Cell Structure

The interior of the cell is divided into the nucleus and the cytoplasm. The nucleus is a spherical or oval-shaped structure... Read More

Apolar

Apolar (Science: biology) Having no radiating processes; applied particularly to certain nerve cells. Origin: Pref. A- -... Read More

Polarization

Definition noun (general) The condition of polarity (biology) The process or act of producing positive and negative... Read More

Multipolar

multipolar (Science: biology) Having many poles; applied especially to those ganglionic nerve cells which have several... Read More

Unipolar

unipolar 1. (Science: physics) Having, or acting by means of, one pole only. 2. (Science: anatomy) Having but one pole or... Read More

Plasma membrane

Do all cells have a plasma (or cell) membrane? Yes, all cells have a biological membrane that separates the protoplasm from... Read More

Polypeptide

Polypeptide Definition Biology What are polypeptides? A polypeptide is defined as a polymer of amino acids joined together... Read More

Diffusion

Diffusion Definition Diffusion is the net passive movement of molecules or particles from regions of higher to regions of... Read More

Meiosis

What is Meiosis? A simple definition of meiosis would be is this: meiosis is the process of cell division that results in... Read More

Gamete

Definition of Gamete What is a gamete? A gamete is the mature reproductive or sex cell that contains a haploid number of... Read More

Facilitated diffusion

Facilitated diffusion is the transport of substances across a biological membrane from an area of higher concentration to an... Read More

Human Reproduction

Terminology and Concepts Primary reproductive organs are called gonads - testes in the male and ovaries in the female.... Read More

Lipid

Definition noun plural: lipids lip·id, ˈlɪp ɪd, ˈlaɪ pɪd A fatty or waxy organic compound that is readily soluble... Read More

Transport

In biology, transport refers to the act or the means by which a molecule or ion is moved across the cell membrane or via the... Read More

Phospholipid

Definition noun plural: phospholipids phos·pho·lip·id, ˌfɒsfəˈlɪpɪd (1) A lipid with one or more phosphate groups... Read More

Compound

Definition noun plural: compounds com·pound, ˈkɒmpaʊnd (general) A material made up of two or more parts or... Read More

Carbon dioxide

Carbon Dioxide Definition noun, car·bon di·ox·ide, /daɪˈɒksaɪd/ (biochemistry) An inorganic compound, with the... Read More

Covalent bond

Covalent Bond Definition What is a covalent bond? In chemistry and other fundamental science fields, a covalent bond is... Read More

Phospholipid bilayer

Definition noun The two layers of phospholipids arranged in such a way that their hydrophobic tails are projecting inwards... Read More

Biome

Biome Definition What are biomes? There is no universal definition of biomes. But biome definition in biology of different... Read More

Primary oocyte

Definition noun, plural: primary oocytes The oocyte that arises from the oogonium via the process of oocytogenesis, and... Read More

Projection

projection 1. The act of throwing or shooting forward. 2. A jutting out; also, a part jutting out, as of a building; an... Read More

Animal cell

An animal cell is the fundamental functional unit of life of animals. It is also the basic unit of reproduction. Animal... Read More